en سوخت های جایگزین Modern Powertrain (hybrid, electric, CNG, bio, ...) پژوهشي Research A comparative full life cycle assessment of a gasoline vehicle and a fuel cell vehicle (FCV) with five different fuel cycles including steam methane reforming (SMR), coal gasification, photovoltaic (PV), solar thermal, and grid-based electrolysis is presented in this paper. The results show that the total greenhouse gas emissions (GHG) are mainly found in the materials production and the component manufacturing stages of the FCV. Among various hydrogen production methods, the FCV with PV electrolysis has the lowest GHG emissions of 0.13 kg CO₂ eq./km. The total GHG emissions of the gasoline vehicle are estimated as 0.30 kg CO₂ eq./km mainly from the operation stage. An uncertainty analysis is carried out to assess the effects of variations of different input parameters on the total emissions. With a 95% level of confidence, the total emissions of the FCV with PV electrolysis is 0.18±0.05 kg CO₂ eq./km. The component manufacturing and assembly stage drives the total GHG emissions uncertainty the most. Fuel cell vehicle, Greenhouse gas emissions, Hydrogen Production 3266 3280 http://ase.iust.ac.ir/browse.php?a_code=A-10-488-1&slc_lang=en&sid=1 Shayan Sadeghi shayan.sadeghi21@gmail.com 180031947532846003592 180031947532846003592 No Sustainable Energy Research Group (SERG), School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran Samane Ghandehariun samane_ghandehariun@iust.ac.ir 180031947532846003593 180031947532846003593 Yes Sustainable Energy Research Group (SERG), School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran